Bhagavad Gita 4.17

कर्मणो ह्यपि बोध्द्यं बोध्व्यं च विकर्मण: |
अकर्मणश्च बोधव्यं गहना कर्मणो गति:

Translation

You must understand the nature of all three—recommended action, wrong action, and inaction. The truth about these is profound and difficult to understand.